I hear the treble is rolled off with no sparkle. That to me is not good treble. I hate when treble is too subdued. Like the ESW9 which a lot of people here on Head-fi love. I thought it was horrible. Sure it had amazing mids and bass, but the treble was 'smooth'. It may as well been called trebleless.

This is why I would never go for headphones like the HD650 and LCD2. I prefer a slight tip towards treble than mids.

MLE, I mostly agree with your review of the Pro 2900. Especially when it comes to the soundstage and placement. I suppose the S-Logic tech just doesn't work with my ears as I really don't get a sense of a normal soundstage with the 2900s. It feels... fake. Like the headphone is tricking me into thinking the soundstage is wider than it is. This may work for some, but for me it becomes distracting after a short time. Although, like you said, the placement of sounds is very accurate. It is quite easy to tell where a sound is coming from in a game while wearing the 2900s.

Unfortunately, I also have a big issue with the fit of these headphones. The design of the drivers is as such if you don't have them perfectly centered over your ears and head the sound changes drastically. I have found that if pushed slightly forward on my head the treble detail fades quickly and bass becomes boomy. If they are slid back just a bit the treble really takes over and they can actually become a bit too bright. When centered they do sound quite good - with deep, detailed bass and pleasant treble.

I have a pair of HE400s on their way right now and I fully expect them to surpass the 2900s in every category, especially the soundstage dept. I will post my impressions later this week or early next week.

Gaming/Movies on Xbox: Just loved it!! It takes a lil getin used to since without the mixamp the sounds are all right there, sort of in front of your ears. With the mixamp on DH at first you get the feeling that sounds are more distant, but that´s exactly what it should do and the overall sound is very, very good. No hiss, nothing.

Same for movies. I tried a helicopter scene with and without DH on a couple of times and DH just adds so much depth and room to the sound. Great.

TV/Sports/Movies: Movies sound great via the cable box as well (only tried one though), TV and sports not so much. I think I´d rather watch this without DH on, even though a lot of stuff is broadcasted in DD 5.1.

Blu Ray: Well, here comes the real downside! I was not able to geht sound via coax. Sound in the menus was there, but not in the movie itself. I guess it´s some sort of format issue... DTS? On what setting do I have to have my blu ray player to get sound through the mixamp??

On last thing: I think the mixamp could drive the DT 990 pro a lil louder.

What I did is, I set "digital audio" to "PCM" instead of "bitrate". Whatever hat means ;) Would I also want the PCM-Downsampling on "on" or "off" (96 to 48 kHZ)? I ain´t got no idea what that means. sorry.

Not really. Turning DH on is not true DH unless the signal is Dolby Digital. Problem is Blu-Rays mostly do DTS for english audio, so the Mixamp won't work its magic there. Just set it to whatever gets audio to the Mixamp and turn DH off. It'll be stereo audio.